Merge pull request #19825 from lidizheng/syntax-py3

Make py3 syntax check happy

tools/run_tests/sanity/check_bazel_workspace.py

@@ -132,7 +132,7 @@ build_rules = {
     'load': lambda a, b: None,
     'git_repository': lambda **args: eval_state.git_repository(**args),
 }
-exec bazel_file in build_rules
+exec (bazel_file) in build_rules
 for name in _GRPC_DEP_NAMES:
     assert name in names_and_urls.keys()
 assert len(_GRPC_DEP_NAMES) == len(names_and_urls.keys())
@@ -174,7 +174,7 @@ for name in _GRPC_DEP_NAMES:
         'load': lambda a, b: None,
         'git_repository': lambda **args: state.git_repository(**args),
     }
-    exec bazel_file in rules
+    exec (bazel_file) in rules
     assert name not in names_and_urls_with_overridden_name.keys()
 
 sys.exit(0)